Removal of H2S and CO2 from a hydrocarbon fluid stream
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United States of America Patent
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Apr 19, 2005
Grant Date -
Mar 25, 2004
app pub date -
Sep 24, 2002
filing date -
Sep 24, 2002
priority date (Note) -
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Abstract
A system for removal of Hydrogen Sulfide (H.sub.2 S) and/or Carbon Dioxide (CO.sub.2) from natural gas via absorption and disassociation utilizing a sea water contact system. In the preferred embodiment of the present invention, a series of counter current scrubber stages is provided, each configured to remove via absorption/disassociation a portion of the impurities, each stage having less pressure than the predecessor, each stage redirecting the purified gas to the preceding stage, until the contaminant level in the hydrocarbon gas stream has been reduced to an acceptable level. The hydrogen sulfide/carbon dioxide contaminants are thereby sequestered in the sea water utilized in the scrubber, which sea water may be further processed and/or re-introduced into the deep of a body of water, where the contaminants will remain isolated for hundreds of years. The present invention further contemplates and energy recovery system for greatly enhancing the efficiency of the system. Accordingly, the present invention provides an efficient and cost effective method for the purification of natural gas on an offshore platform.
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